Do you use any mods for the game? Also, if you use GOG Galaxy, please check if the game version is actually matching the trainer version. It happens that Galaxy sometimes misses game updates but never notifies about it.

I have the same version of the game but I still cannot get the trainer to work. I followed your steps but I still got the same result. All the trainer says is "Error" when I try to activate it. error log states error in line 95. Object not found.